/Engine/Source/Editor/Kismet/Public/BlueprintActionMenuBuilder.h
Responsible for constructing a list of viable blueprint actions. Runs the blueprint actions database through a filter and spawns a series of FBlueprintActionMenuItems for actions that pass. Takes care of generating the each menu item's category/name/etc.
struct FBlueprintActionMenuBuilder : public [FGraphActionListBuilderBase](API\Runtime\Engine\EdGraph\FGraphActionListBuilderBase)